fix(logging): handle mid-line streaming output in test logger and add streaming tests

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tstest',
-  version: '3.1.5',
+  version: '3.1.6',
   description: 'a test utility to run tests that match test/**/*.ts'
 }

ts/tstest.logging.ts

@@ -44,6 +44,7 @@ export class TsTestLogger {
   private currentTestLogFile: string | null = null;
   private currentTestLogs: string[] = []; // Buffer for current test logs
   private currentTestFailed: boolean = false;
+  private isOutputMidLine: boolean = false; // Track whether we're mid-line for streaming output
   
   constructor(options: LogOptions = {}) {
     this.options = options;
@@ -189,6 +190,7 @@ export class TsTestLogger {
     // Reset test-specific state
     this.currentTestLogs = [];
     this.currentTestFailed = false;
+    this.isOutputMidLine = false;
     
     // Only set up test log file if --logfile option is specified
     if (this.options.logFile) {
@@ -352,17 +354,28 @@ export class TsTestLogger {
   testConsoleOutput(message: string) {
     if (this.options.json) return;
 
+    const prefix = '   ';
     // In verbose mode, show console output immediately
     if (this.options.verbose) {
-      this.log(this.format(`   ${message}`, 'dim'));
+      // Only add prefix if we're starting a new line
+      const output = this.isOutputMidLine ? message : prefix + message;
+      this.log(this.format(output, 'dim'));
     } else {
       // In non-verbose mode, buffer the logs
-      this.currentTestLogs.push(message);
+      if (this.isOutputMidLine && this.currentTestLogs.length > 0) {
+        // Append to the last buffered entry since we're mid-line
+        this.currentTestLogs[this.currentTestLogs.length - 1] += message;
+      } else {
+        this.currentTestLogs.push(message);
+      }
     }
 
+    // Reset mid-line state since we just output a complete line
+    this.isOutputMidLine = false;
+
     // Always log to test file if --logfile is specified
     if (this.currentTestLogFile) {
-      this.logToTestFile(`   ${message}`);
+      this.logToTestFile(`${prefix}${message}`);
     }
   }
 
@@ -371,13 +384,15 @@ export class TsTestLogger {
     if (this.options.json) return;
 
     const prefix = '   ';
+    // Only add prefix if we're starting a new line (not mid-line)
+    const output = this.isOutputMidLine ? message : prefix + message;
+
     if (this.options.verbose) {
       // Use process.stdout.write to preserve streaming without adding newlines
-      process.stdout.write(this.format(prefix + message, 'dim'));
+      process.stdout.write(this.format(output, 'dim'));
     } else {
-      // Buffer without trailing newline - append to last entry if exists and incomplete
-      if (this.currentTestLogs.length > 0) {
-        // Append to the last buffered entry (for streaming segments)
+      // Buffer mode: append to last entry if mid-line
+      if (this.isOutputMidLine && this.currentTestLogs.length > 0) {
         this.currentTestLogs[this.currentTestLogs.length - 1] += message;
       } else {
         this.currentTestLogs.push(message);
@@ -386,8 +401,11 @@ export class TsTestLogger {
 
     // Log to test file without adding newline
     if (this.currentTestLogFile) {
-      this.logToTestFileRaw(prefix + message);
+      this.logToTestFileRaw(output);
     }
+
+    // We're now mid-line (no newline was written)
+    this.isOutputMidLine = true;
   }
 
   private logToTestFileRaw(message: string) {